A heat treatment furnace

Abstract

The invention discloses a thermal treatment heating furnace, and relates to a heating device. The thermal treatment heating furnace comprises a furnace body, a feeding device and a temperature control device. A supporting pillar is fixed to the side wall of the inside of the furnace body, and a thermal baffle is placed on the supporting pillar. An annealing chamber is arranged above the thermal baffle, and a tempering chamber is arranged below the thermal baffle. The feeding device comprises a bearing plate which is arranged inside the tempering chamber and can be lifted up and down, and rollers which are arranged on the bearing plate. The temperature control device comprises a heater, an air hose, a circulating fan, a temperature sensor and a controller. The heater is installed inside the annealing chamber. The air hose is arranged inside the tempering chamber, and the two ends of the air hose are connected with the annealing chamber. The circulating fan is arranged on the air hose. Airflow in the air hose can further be used for driving the rollers to rotate. By means of the thermal treatment heating furnace, when workpieces are subjected to annealing treatment in the annealing chamber, other workpieces can be subjected to tempering treatment in the tempering chamber, tempering heat comes from the annealing chamber, and thus utilization efficiency of heat energy can be improved.

Description

technical field [0001] The invention relates to a heating device, in particular to a heating furnace for heat treatment. Background technique [0002] Annealing is a metal heat treatment process, which refers to slowly heating the metal to a certain temperature, keeping it for a sufficient time, and then cooling it at an appropriate speed. The purpose is to reduce hardness, improve machinability; eliminate residual stress, stabilize size, reduce deformation and crack tendency; refine grain, adjust structure, and eliminate structure defects. The annealing temperature of alloy steel is usually 1050 ~ 1200 ℃. [0003] Tempering reheats the quenched workpiece to an appropriate temperature lower than the lower critical temperature AC1 (the temperature at which the transformation of pearlite to austenite begins during heating), and cools the metal in air or water, oil and other media after a period of heat preservation heat treatment process. Or heat the quenched alloy workpiec...

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Problems solved by technology

[0004] During the annealing process, when the temperature in the heating furnace is too high, it is necessary to reduce the temperature of the heating furnace, usually by discharging the hot gas from the heating furnace and blowing in energy air to reduce the temperature, so most of the heat will be lost; at the same time During the cooling process of annealing treatment, the heat source of the heating furnace is usually turned off, and then the hot air in the heating furnace is gradually discharged to reduce the temperature in the heating furnace, so most of the heat is lost, and the heat cannot be fully utilized.

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